Effect of tire dynamic characteristics on vibration load at the operator’s workplace

Abstract

The article addresses a current issue – reducing the vibration load at the operator’s workplace in the utility machine with respect to the use of chassis elements as vibroprotection element. The results of studies aimed at determining the effect of tires dynamic characteristics on the vibration load of the operator’s workplace are presented. A computational scheme designed to conduct experimental research has been shown. Correlation between tire rigidity and air pressure in the tire, as well as correlation between tire service life and tire pressure have been revealed. Results of studies aimed at determining relations between the dynamics of mean-square values of vibration acceleration of the frame, the floor and the operator’s seat, and the rigidity coefficients of utility machine tires. Conclusions have been made as to the relevance of using chassis elements as vibroprotection element at the operator’s workplace in the utility machine.

Research Results on Influence of Hydraulic Hammer Design Parameters

“…where ẋb, ẋk are the absolute movement speeds of the hammer and body. A change pressure speed (P ̇H) of the pressure hydraulic line is determined with the formula [7,10]:…”

“…The range of variable parameters was determined based on the technical characteristics of the 2 size group excavator [1,10]. In the theoretical studies, the main parameters varied as follows: -the area of the hammer on the working stroke chamber side (S 2 ) is within 10.3810-4 and 18.5910-4 m 2 ;…”

Trencher equipment

“…where к1 -specific resistance to digging, N/m 2 ; P T -productivity of the trencher, m 3 /h [14]. Power used to lift the ground (N p ) is determined by formula…”